The object was jet black and was a rectangle shape with wavy edges. It was very clear and appeared to be low but its hard to tell because I dont know how big it was. I could not see any lights or marks on it. It looked flat. It didn't seem to make any noise as My dog who howls at sirens, aircrafts and hot air balloons was not even aware it was there. It moved very slowly. I watched it for about 3 minutes then lost it behind some trees. I ran into the house to look out of an upstairs window but I couldn't see it anymore. I am an average, level headed Primary school teacher and did not believe in Ufos until now!